Plastic Additives Introduction

Plastic Additives Introduction

Plastic Additives are key materials used to improve plastic performance, processing technology or give special functions, and there are many types. The following are the main classifications and representative additives, summarized in combination with current industry applications:

1. Processing Modification Additives

Lubricants (such as stearic acid, paraffin): reduce melt friction and improve demolding.

Mold release agents (silicone oil, fluorine compounds): prevent plastic from adhering to the mold.

Plasticizers (phthalates, environmentally friendly citrates): increase flexibility (such as PVC soft products).

2. Performance Enhancement Additives

Antioxidants (phenols, phosphites): delay oxidative degradation under high temperature or ultraviolet light.

Light stabilizers (hindered amine HALS, ultraviolet absorbers): improve weather resistance and extend outdoor service life.

Heat stabilizers (lead salts, calcium zinc complexes): mainly used in PVC to prevent thermal decomposition during processing.

3. Functional Additives

Flame retardants (bromine, phosphorus, aluminum hydroxide): meet the fire protection requirements of electronic appliances and building materials.

Antistatic agents (quaternary ammonium salts, alkyl sulfonates): reduce surface charge accumulation (such as packaging films).

Foaming agents (physical foaming agents such as CO₂, chemical foaming agents AC): manufacture lightweight foam plastics.

4. Filling And Reinforcing Additives

Inorganic fillers (calcium carbonate, talc, mica): reduce costs and improve rigidity.

Fiber reinforcement agents (glass fiber, carbon fiber): significantly improve mechanical strength (such as engineering plastics).

5. Other Special Additives

Colorants (organic pigments, titanium dioxide): provide color and hiding power.

Antibacterial agents (silver ions, organic azoles): used in medical devices and daily necessities.

Biodegradable additives (starch-based, PLA compatibilizers): promote the development of environmentally friendly plastics.

According to the specific plastic type (such as PP, PVC, ABS) and application scenario (food packaging, automotive parts), the selection of additives needs to comprehensively consider performance, cost and regulatory requirements.

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